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Adaptive sampling frequency offset estimation algorithm for OFDM system
Sun Yuming, Zhang Yanzhong, Shao Dingrong, Li Shujian*
School of Electronics and Information Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100191, China

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Abstract�� The estimation formula of sampling frequency offset estimation algorithm based on data decision was corrected. An orthogonal frequency division multiplexing (OFDM) system adaptive sampling frequency offset estimation algorithm was presented. The frequency offset change using discrete pilots to find the interval of the data symbol was estimated, and the sampling frequency offset estimation using the channel estimation results and the received data at the same time was implemented to improve the estimation precision. The simulation results show that, the estimation precision of the new algorithm is higher than the method using pilots or data decision respectively about 3 dB in additive white Gaussian noise channel, and about 5 dB in multipath fading channel. The experiment results show the constellation could be converged better. Therefore, the receiver performance could be improved.
Keywords�� orthogonal frequency division multiplexing   adaptive algorithms   sampling   synchronization     
Received 2010-04-07;
About author: ������(1981-),��,����������,��ʿ��,goodlucksunym@189.cn.
������, ������, �۶���, �����.����ӦOFDM����Ƶƫ�����㷨[J]  �������պ����ѧѧ��, 2011,V37(8): 1001-1005
Sun Yuming, Zhang Yanzhong, Shao Dingrong, Li Shujian.Adaptive sampling frequency offset estimation algorithm for OFDM system[J]  JOURNAL OF BEIJING UNIVERSITY OF AERONAUTICS AND A, 2011,V37(8): 1001-1005
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